Yosemite 10.10.1 how to disable driver signature check

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Level 1

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Yosemite 10.10.1 how to disable driver signature check

Hello,

I have a MacBook Pro 15" Retina late 2013 (i7 2,3 GHz - 16 GB Ram - SSD 512 GB - Intel Iris Pro Graphics NVIDIA GeForce GT 750M 2GB)

I need to update my computer for editing and color correction with 4K workflow on DaVinci Resolve 10. I've purchased a PCIe expansion chassis and a Gigabyte GTX970. Now I have to install the drivers of the "maxwell" graphic card.

First, I've installed Yosemite 10.10.1 and last CUDA update 6.5.36. After the update of the OS I need to enable "unsigned drivers" via Terminal and typing this boot argument:

sudo nvram boot-args="kext-dev-mode=1"

To do this, all others users access to Terminal with admin privileges and after typing sudo argument, have to typing their own password.

When I type the "sudo", my computer don't ask me any password and, if I type it, Terminal adds a new prompt.

Why? I don't know where I make mistakes. Please, can you help me? Thank you.

This is the right prompt:

MacBook Pro with Retina display, OS X Yosemite (10.10.1), null

Posted on Jan 19, 2015 1:31 AM

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Answer 1

Lexiepex

Level 6

14,108 points

Jan 19, 2015 3:31 AM in response to giosh74

after a sudo command (as in the second screen grab): type the password (it will not show anything) and enter.

That's it.

when you

Note: you disrobe Yosemite of a whole security level, just for your one application. Is there not a new update?

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Answer 2

Imp68

Level 4

2,672 points

Jan 19, 2015 3:35 AM in response to giosh74

Remove the quotation marks.

sudo nvram boot-args=kext-dev-mode=1

But it's a bad idea in the first place.

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Answer 3

Barney-15E

Level 10

122,198 points

Jan 19, 2015 8:19 AM in response to giosh74

As Imp68 notes it is the quotes. But not only the quotes, you have one normal quote and one "smart" quote. Since you ended the line with the "Smart" quote, bash is waiting for you to complete the command as there is no ending quote.

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Answer 4

Jan 19, 2015 8:54 AM in response to giosh74

giosh74 wrote:
... After the update of the OS I need to enable "unsigned drivers" ...

While I agree with everyone else that it's not a good idea to disable a significant OS security feature, wouldn't it just be easier to use TRIM Enabler to activate TRIM for third party SSD's? TRIM is already enabled for your Apple SSD but part of the installation involves disabling the test for unsigned drivers. Just be sure to read the "Important Issues" section first.

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Answer 5

Lexiepex

Level 6

14,108 points

Jan 19, 2015 9:04 AM in response to FatMac-MacPro

You can use TrimEnabler to do change the security level, good idea. But do not use the Trim command, as I and several others explained detailed in the last weeks in other threads.

I am not exactly sure but I think, TE does not do Trim and the kext level separately.

Lex

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Answer 6

Jan 19, 2015 10:21 AM in response to Lexiepex

LexSchellings wrote:

... But do not use the Trim command, as I and several others explained detailed in the last weeks in other threads.

I am not exactly sure but I think, TE does not do Trim and the kext level separately...

If you mean by "Trim command" running fsck in Single User Mode, FWIW, running it on a rMBP with the Apple SSD also gives "Trimming unused blocks" even when TRIM Enabler isn't involved.

And I agree that while the disabling of kext signing and enabling of TRIM Enabler sounds like a two step process when described in "Trim Enabler support," it's likely informational and getting tacit agreement rather than "pick one or both."

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Answer 7

Lexiepex

Level 6

14,108 points

Jan 19, 2015 10:56 AM in response to FatMac-MacPro

Communication failure.

Applewith Apple SSD built in, have trim in OSX. I was talking about the install of Trim in for non-Apple SSDs. This is manipulation of a kext, which means that the mac just does not start anymore, unless you set the dev mode to 1. read some of the threads.

Thanks for your support.

Lex

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Answer 8

Jan 19, 2015 11:51 AM in response to Lexiepex

Having been bitten by "the mac just does not start anymore" problem before TRIM Enabler introduced the kext-signing fix, I know what you mean. I have a Mac with Apple's SSD and another with an SSD that supports TRIM as well as an SSD that doesn't support TRIM but TRIM can be enabled on the latter two so that when Repair Disk is run, "Trimming unused blocks" will appear if the target otherwise supports TRIM.

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